An ultra-high whiteness and yellowing-resistant glass fiber reinforced halogen-free flame-retardant polyamide material
By using specific processes and material combinations, the problem of decreased whiteness and toughness of nitrogen-based flame-retardant polyamide materials after the addition of glass fiber was solved, and ultra-high whiteness and yellowing-resistant glass fiber reinforced halogen-free flame-retardant polyamide materials were prepared, meeting the high whiteness and flame-retardant requirements of electrical appliance housing materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 中广核俊尔(浙江)新材料有限公司
- Filing Date
- 2023-07-25
- Publication Date
- 2026-06-30
AI Technical Summary
Existing technologies struggle to maintain the high whiteness and toughness of nitrogen-based flame-retardant polyamide materials after incorporating glass fibers. In particular, when the whiteness value exceeds 94, the modulus and notched impact strength of the material decrease, and yellowing issues arise.
By using a twin-screw extruder with a specific aspect ratio, combined with optimized antioxidant combinations, using specific grades of wetting agents and glass fiber pretreatment, adding specific titanium dioxide and glass fiber powder, and wetting PA6 chips with liquid additives, a glass fiber reinforced halogen-free flame-retardant polyamide material with ultra-high whiteness and resistance to yellowing was finally prepared.
It achieved a whiteness value greater than 94, a flame retardancy of less than 30 seconds, an unnotched impact strength of more than 25 kJ/m2 for simply supported beams, significantly improved resistance to yellowing, and maintained good material properties.